66. A 29-year-old man presents with fever, sore throat, myalgia, and rash after unprotected sex. Rapid HIV antibody test is negative. Which test should be ordered next to confirm acute HIV infection?

A patient presents with severe shortness of breath and bilateral crackles. Chest X-ray shows diffuse alveolar infiltrates. Which diagnosis is most likely?

37 . Which of the following is the most common cause of a transudative pleural effusion?

A 34-year-old woman presents with grouped vesicles on an erythematous base around the mouth. Which is the likely pathogen?

A 65-year-old smoker presents with a new cough, weight loss, and hemoptysis. Chest X-ray shows a hilar mass. What is the most likely diagnosis?

70. A patient presents with persistent fever and night sweats. Which of the following findings is most concerning for malignancy rather than infection?

Which test is most specific for latent tuberculosis infection?

23.. A 55-year-old smoker presents with chronic cough and sputum production for 3 months in two consecutive years. What is the most likely diagnosis?

A 68-year-old man with COPD presents with hypoxemia and cyanosis. Long-term oxygen therapy is indicated when PaO2 is:

A benign, “stuck-on,” waxy lesion commonly seen in older adults is: